工业厂房低压无功补偿相关参数计算

Calculation of Related Parameters of Low Voltage Reactive Power Compensation for Industrial Plants

低压无功补偿设计中,通常负荷计算得出的电容补偿容量为实际输出容量,而采购安装时需明确额定容量,若将此容量当作安装容量,在大负荷情况下会造成无功补偿容量不足,功率因数无法满足国家规范标准要求。因电容器实际输出补偿容量与运行电压、串联电抗器电抗率有关,而电抗率与电网背景谐波有关。在工业厂房工程设计中应了解主要谐波源,选择合适电抗率的电抗器,确定电容器额定电压和额定输出容量。

In the design of low-voltage reactive power compensation,the capacitance compensation capacity calculated by the load is commonly the actual output capacity,and the rated capacity must be specified when purchasing and installing.If this capacity is used as the installation capacity,it will cause a large load in the design.The power compensation capacity is insufficient,and the power factor cannot meet the requirements of national standards.The actual output compensation capacity of the capacitor is related to the operating voltage and the reactance of the series reactor,and the reactance rate is related to the background harmonic of the power grid.In the industrial plant engineering design,the main harmonic sources shall be understood,the reactor with the appropriate reactance rate shall be selected to determine the rated voltage and rated output capacity of the capacitor.